The graph and the table show the high temperatures in a city over a 10-day period.

1. What was the high temperature on Day 7?

2. On which day(s) was the high temperature 61 degrees Fahrenheit?

3. Is the high temperature a function of the day? Explain how you know.

4. Is the day a function of the high temperature? Explain how you know.

The amount Lin’s sister earns at her part-time job is proportional to the number of hours she works. She earns \$9.60 per hour.

1. Write an equation in the form \(y=kx\) to describe this situation, where \(x\) represents the number of hours worked and \(y\) represents the amount earned in dollars.

2. Is \(y\) a function of \(x\)? Explain how you know.

3. Write an equation describing \(x\) as a function of \(y\).

Solve the system of equations: \(\begin{cases} y=7x+10 \\ y=\text-4x-23 \\ \end{cases}\)